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A kind of bcsltm-sa composite microwave dielectric ceramic and preparation method thereof

A technology of microwave dielectric ceramics and ceramics, applied in the field of microwave dielectric ceramics, can solve the problems of unstable structure, high sintering temperature, performance deterioration, etc. Effect

Active Publication Date: 2022-02-08
GUANGDONG GOVA ADVANCED MATERIAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, more studies have been conducted on Ba with a dielectric constant of around 80. 6-3x ln 8+2x Ti 18 o 54 The (Ln=La,Sm) system has a large loss and an unstable structure, and the high sintering temperature is prone to titanium reduction, resulting in a significant deterioration in performance, which still needs further research.

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  • A kind of bcsltm-sa composite microwave dielectric ceramic and preparation method thereof

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preparation example Construction

[0045] The present invention also provides a preparation method of the BCSLTM-SA composite microwave dielectric ceramic described in the above technical solution, comprising the following steps:

[0046] a) BaCO 3 , CaCO 3 、Sm 2 o 3 , La 2 o 3 、TiO 2 and MnO 2 After mixing, the first grinding treatment is carried out, and then the first pre-sintering is carried out to obtain BCSLTM pre-sintered material; at the same time, the Sm 2 o 3 and Al 2 o 3 After mixing, the second grinding treatment is carried out, and then the second pre-sintering is carried out to obtain the SA pre-sintered material;

[0047] b) After mixing the BCSLTM pre-sintered material obtained in step a) and the SA pre-sintered material, perform the third grinding treatment to obtain a powder; then add a binder to the powder for granulation and molding to obtain a ceramic raw material Blank; finally, the obtained ceramic green body is sintered to obtain BCSLTM-SA composite microwave dielectric cerami...

Embodiment 1

[0087] (1) Weigh 34.3517g BaCO 3 , 5.808g CaCO 3 、75.8999g Sm 2 o 3 、29.7767gLa 2 o 3 , 104.1638g TiO 2 and 0.6411g MnO 2 , mixed to obtain the first mixture; the first mixture, zirconium balls and deionized water were wet-milled with a planetary mill for 6 hours at a mass ratio of 1:2:2, dried at 150°C, and dried at 850 Pre-fired at ℃ (in the air atmosphere) for 3 hours, the heating rate was 3 ℃ / min, and cooled with the furnace to obtain BCSLTM pre-fired material.

[0088] (2) According to SmAlO 3 The molar ratio weighs 193.4339g Sm 2 o 3 and 56.5661g Al 2 o 3 , mixed to obtain the second mixture; the second mixture, zirconium balls and deionized water were wet-milled with a planetary mill for 6 hours at a mass ratio of 1:2:2, dried at 150°C, and dried at 1100 Pre-fired at ℃ (in the air atmosphere) for 2 hours, the heating rate was 3 ℃ / min, and cooled with the furnace to obtain SA calcined material.

[0089] (3) Weigh 95g of BCSLTM calcined material, 5g of SA cal...

Embodiment 2

[0096] (1) Weigh 34.3517g BaCO 3 , 5.808g CaCO 3 、75.8999g Sm 2 o 3 、29.7767gLa 2 o 3 , 104.1638g TiO 2 and 0.6411g MnO 2 , mixed to obtain the first mixture; the first mixture, zirconium balls and deionized water were wet-milled with a planetary mill for 6 hours at a mass ratio of 1:2:2, dried at 150°C, and dried at 850 Pre-fired at ℃ (in the air atmosphere) for 3 hours, the heating rate was 3 ℃ / min, and cooled with the furnace to obtain BCSLTM pre-fired material.

[0097] (2) According to SmAlO 3 The molar ratio weighs 193.4339g Sm 2 o 3 and 56.5661g Al 2 o 3 , mixed to obtain the second mixture; the second mixture, zirconium balls and deionized water were wet-milled with a planetary mill for 6 hours at a mass ratio of 1:2:2, dried at 150°C, and dried at 1100 Pre-fired at ℃ (in the air atmosphere) for 2 hours, the heating rate was 3 ℃ / min, and cooled with the furnace to obtain SA calcined material.

[0098](3) Weigh 92.5g BCSLTM calcined material, 7.5g SA calcin...

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Abstract

The invention provides a BCSLTM-SA composite microwave dielectric ceramic and a preparation method thereof, wherein the BCSLTM-SA composite microwave dielectric ceramic comprises: BCSLTM and SmAlO 3 ; Wherein, the SmAlO 3 The mass percentage content is 5%~15%. Compared with the prior art, the BCSLTM-SA composite microwave dielectric ceramics provided by the present invention are composited by specific proportioning BCSLTM and SA; the BCSLTM-SA composite microwave dielectric ceramics include BCSLTM and SmAlO 3 Two crystal phase structures, stable structure, specific dielectric constant and high Q×f value, and the temperature coefficient of resonant frequency is continuously adjustable.

Description

technical field [0001] The invention relates to the technical field of microwave dielectric ceramics, and more specifically relates to a BCSLTM-SA composite microwave dielectric ceramic and a preparation method thereof. Background technique [0002] With the continuous development of modern communication technology, people have higher and higher requirements for the miniaturization, high performance and low cost of mobile communication equipment. This trend largely depends on the dielectric constant of the microwave dielectric ceramic material used. At the same resonant frequency, the larger the dielectric constant, the smaller the wavelength, and the smaller the size of the corresponding dielectric resonator. At the same time, the greater the dielectric constant, the more concentrated the electromagnetic energy is in the medium, and the less affected by the surrounding environment. Therefore, high dielectric constant microwave dielectric ceramic materials (dielectric const...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/468C04B35/50
Inventor 殷旺吴悦广马才兵吕开明
Owner GUANGDONG GOVA ADVANCED MATERIAL TECH